Floatage collecting apparatus and method

ABSTRACT

Apparatus and method for removing floating material from the surface of a body of liquid and for collecting the material has an endless belt-type materials transport mounted, as by rollers with vertically-separated horizontal rotation axes, to dispose the transport with a lower flight inclined downwardly from above the liquid surface at a frontal location to below the surface at a rearward location. A collection well is contiguously behind the rearward location. The transport is driven to advance the lower flight in the direction from the frontal location to the rearward location. This motion carries floating material from the liquid surface downward and rearward under the lower flight of the transport and releases it at the rearward location to float upward into the collection well. A method for floatage collection by steps that the foregoing apparatus performs is also disclosed.

United States Patent 119 Farrell et al.

1 51 Apr. 16, 1974 [54] FLOATAGE COLLECTING APPARATUS 3,637,080 1/1972 Martel 210/83 AND METHOD 3,715,034 2/1973 lvanofi' 210/242 [75] Inventors: James H. Farrell; Ralph A. Bianchi, OR PATENTS R APPLICATIONS both of Lexington; Edward 1,131,513 10/1968 Great Britain 210 1310. 21 Johanson, Lynnfield, all of Mass. [73] Assignee: JBF Scientific Corporation, Primary Examiner-The0d0re ranger Burlington, Mass, Attorney, Agent, or Firm-Kenway'& Jenney,

[22] Filed: Mar. 6, 1972 ACT 57 ABSTR [21] Appl. No.: 231,977 Ex 1 d h df fl l pparatus an met 0 or removing oatmg materia Related Application Data from the surface of a body of liquid and for collecting Continuation-impart 0f June 0 the material has an endless belt-type materials trans- 1971 abandmedport mounted, as by rollers with vertically-separated horizontal rotation axes, to dispose the transport with a [52] Cl 210/83 210/ Die 210/242 a lower flight inclined downwardly from above the liq- 210/526 uid surface at a frontal location to below the surface [51] Int. Cl BOld 21/00 at a rearward location A collection we is contigw [53] Field of Sean! 210/83 ously behind the rearward location. The transport is 210/4011 526 driven to advance the lower flight in the direction from the frontal location to the rearward location. References Cited This motion carries floating material from the liquid UNITED STATES PATENTS surface downward and rearward under the lower flight 3,314,540 4/1967 Lane 210 400 of the transport and as s it at the rearward loca- 3,615,017 /1971 Valdespino 210/2 42 tion to float upward into the collection well. A method 3,617,556 11/1971 Cole 210/523 for floatage collection by steps that the foregoing ap- 3,6l7,555 1 H1971 Ginsburgh; 210/523 paratus performs is also disclosed 3,3l4,545 4/1967 Grabbe et al. 210/401 3,670,896 6/1972 Hale, Jr. 210/242 22 Claims, 8 Drawing Figures a-58 Io 1 i 9 2 182 52 1 4A 8 o 28 w 32 46 I2 16 4o 448 16 1, :T 34 p//" I Ee I -l -fp r 3\O ,1

MTENIEH APR 1 6 I974 SHEEI 1 UF 3 DEBUG PATENTEU AFR 8 I974 SHEET 2 BF 3 FLOATAGE COLLECTING APPARATUS AND METHOD BACKGROUND This application is a continuation-in-part of the copending and now abandoned U.S. Pat. application Ser. No. 151,838 filed June 10, 1971 and entitled Floatage Collecting Apparatus.

This invention relates to apparatus for removing floating material from the surface of a body of liquid and for collecting it. More particularly, the invention provides equipment for removing oil, oil-sorbents and other floating material from, for example, an open body of water by means of an endless material transport that moves relative to the water in such a way as to trap substantially whatever volume of both liquid and solid floatage which is present. The equipment is typically deployed on a barge-like or other floating craft, and used for cleaning floatage from a body of water such as a harbor or beach area. The invention will accordingly be described in this context, although it provides advantages which can be used in other environments.

Prior floatage removing equipment employing endless belt transports, such as those described in U.S. Pats. No. 3,314,540 and No. 3,314,545, are considered by their design to have a limited capacity to collect floatage of both solid and liquid forms. In particular, some prior constructions depend on adherence of the floatage to the belt transport to recover the floating material. Others provide structures that push the floatage to recover it, and others require pumps to collect the floating material. Still others tend at least partially to bulldoze the floating material being recovered in front of them, which increases the likelihood that some floatage will be pushed to the side and hence not collected.

Also, a prior skimming type of floatage recovery equipment has a submerged forward lip or shelf edge and processes all material, whether floatage to' be removed or the liquid beingskimmed', which is above the shelf edge. Similarly, this skimming type of recovering equipment takes in only the floatage which is above the shelf edge, and hence leaves floatage uncollected where there is a considerable depth of floatage.

Accordingly, itis van object of this invention to provide equipment for removing floating material'from a body of water and which recovers essentially all floatage in its path. Another object of the invention is to provide equipment of the above character which does not significantly bulldoze or otherwise push floatage ahead of it as it moves on the body of water, and further which is capable of collecting essentially the entire thickness of floatage in its path.

It is also an object of the invention to provide equipment of the above character which is capable of collecting liquid floatage, sorbents for liquid floatage, and many forms of solid floatage.

A more specific object of the invention is to provide equipment of the above character that collects and that retains significantly more floatage which it engages under a declined belt than prior equipment.

A further object of the invention is to provide equipment of the above character which is relatively simply in construction and operation.

Another object of this invention is to provide a method for collecting from a body of water essentially all floatage that can be brought into the path of skim- GENERAL DESCRIPTION Floatage recovery equipment embodying the invention and for clearing a body of water incorporates a surface craft, e.g., a boat, carrying an endless belt which rollers support to dispose the belt with a lower flight passing downwardly and rearwardly from a forward roller location above the waters surface to a further roller surface below the water surface. Thus, the lower flight of the materials-transporting belt forms a downwardly and forwardly facing inclined surface which is openly exposed to the water at the bow of the craft. A well-like open-bottomed enclosure is on the craft adjacently behind the aft end of the belt lower flight.

A drive mechanism moves the belt to advance the lower flight from the forward roller to the rearward and lower submerged roller surface. This motion carries floatage in the path of the craft downward with the belt lower flight. It is understood that this occurs because hydrostatic and hydrodynamic pressurestend to urge thefloatage against the belt. At the submerged aft roller surface, the belt turns upward, discharging the floatage trapped under it into the enclosure. Water which enters the enclosure passes out through the open bottom.

The belt-carrying craft preferably has hull walls extending along both sides of the belt lower flight to preclude the sideways flow of material outfrom under the belt. Also, the materials-transporting belt can carry cleat-members to enhance its engagement with floatage trapped under the lower flight. Further, .the materials transport can be pervious or cleated. For example, the belt can have large perforations through it, forming floatage-engaging pockets, and the lower flight of this perforated belt can slide under a stationary platform that blocks leakage of trapped floatage. Transportcleaning devices such as scrapers, squeegees, rollers and brushes preferably engage the materials transport in the well to remove'floatage which adheres to the belt.

Further in accordance with the invention, the well bottom preferably is fitted with a baffle structure. The baffle precludes turbulent currents from drawing collected floatage out of the well. However, floatage enters the well through the baffle, and water leaves the well through the baffle. More particularly, at the aft end of the conveyor lower flight, floatage under the conveyor is free to rise due to its buoyancy. This floatage rises into the collection well both through openings which are located in front of the baffle and which are within the baffle structure.

As floatage accumulates in the well, which is initially filled with water, it displaces the water. The displaced water automatically exits from the well through the baffle. As a result, no significant pressure head developes in the collection well as it fills with floatage, so that ad ditional floatage rises into it as easily as the first increments of floatage. Through all of this operation, the baffle restricts currents from entering the well and carrying out floatage.

In addition to providing a baffle at the well bottom, the invention provides an optional plate spaced below the baffle to diminish still further the passage of turbulent currents through the collection well. As one speciflc, this plate ensures that the collection well is iso lated from currents that arise when the craft maneuvers, such as turning, especially sharply.

The invention accordingly comprises the features of construction, combinations of elements, and arrangement of parts exemplified in the constructions hereinafter set forth, and the several steps and the relation of one or more'of such steps with respectto each of the others exemplified in the method hereinafter disclosed, and the scope of the invention is indicated in the claims.

BRIEF DESCRIPTION OF DRAWINGS For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings, in which: FIGS. 1 and 2 are, respectively, side elevation and top plan views, partly broken away, of a floatage recovering and collecting vessel embodying features of the invention;

. FIG. 3 is a simplified view similar to FIG. 1 of a floatage recovering and collecting craft embodying further features of the invention;

FIG. 4 is a side elevation view of anotherfloatage recovering and collecting vessel embodying the invention;

FIGS. 5A and 5B are fragmentary perspective views showing different forms of materials transports and rollers for use in practicing the invention; and

FIGS. 6 and 7 are, respectively, side elevation and front elevation views, partly broken away, of a surface craft embodying further features of the invention.

I )ESCRI PTION OF ILLUSTRATED EMBODIMENTS,

' FIGS. 1 and'2 show a boat 10 having a downwardly inclined flight 12 of a materials transport 14 openly exposed to the water adjacent the bow 10a for removing floatage 16 from the water surface and collecting it in a storage well 18. The illustrated boat 10 has side-byside floats 20 and 22 joined together by a stern wall 24 and a mid-ship structure 26 to form a catamaran-type hull. The transport 14 is a continuous, endless belt trained over rollers 28 and 30, a driving roller 32 and a tensioning roller 34. The rollers have parallel rotation axes which are horizontal and extend transverse to the bow-stern dimension of the boat. Rollers 28, 30 and 32 are journaled to the inner sides of the hull floatsand span the width between these floats. The tensioning roller 34 is similarly disposed but is mounted by way of moment arms 36, 36; each of which is pivotally secured to a hull float at a point horizontally removed from its rotational mounting of the roller 34 shaft.

The roller 28 is at an upper, forward location 38 on the boat 10. near the bow and well above the water line 40 so that waves likely to be encountered during floatage-recovering operation do not spill over it. The roller 30 is at a lower location 42 spaced sternward and below the location 38 to be continually below the water line 40 during floatage-recovering operation. A straight constructionline tangent to the lower surfaces of both rollers 28 and 30 is thus inclined downward from location 38 to location 42; the angle of the incline relative to the horizontal typically and preferably is between 10 and 35. Other angles generally-within the range between 5" and 45 can however be used; generally the more bouyant the floatage being recovered, the shallower the desired angle. The belt transport 14 passes outwardly around the rollers 28 and 30 to form the lowerflight 12 substantially along this common tangent line. The belt transport also passes outwardly around the drive roller 32, which is above the location 30 and preferably above the water line 40; the illustrated drive roller is slightly forward of the roller 30. The tensioning roller 34 rides over the upperv flight of the belt transport as it passes between the drive roller 32 and the forward roller 28.

The continuous belt which forms the illustrated materials transport 14 is substantially impervious to whatever liquids or other materials which are to be recovered. By way of example, for recovering oil and whatever solid debris is present, the transport can be of woven or extruded construction, or a laminate of both forms of constructions.

As drive mechanism 44, typically including a motor with a gear reducer, is coupled by a drive linkage 46 to roller ,32. The mechanism drives this roller clockwise, as seen in FIG. 1, so that the belt transport moves in the direction shown with arrows 48 to advance the lower flight 12 from roller 28 to roller 30.

As also shown in FIGS. 1 and 2, an optional belt cleaner 50, illustratively in the form of a scraper, is mounted on the mid-ship structure 26 to remove material which adheres to the belt transport as it travels between rollers 30 and 32.

, The-inner walls of the hull floats 22 and the-stem wall 24 form three peripheral sides of the'storage well 18. These walls extend from above the water line 40 to at least the lowest surface of roller 30, and hence to the lowest point along the transport lower flight 12. The

back wall 52 of the mid-ship structure 26, and the.

length of belt transport 14 between rollers 30 and 32, form the remaining, frontmost, peripheral wall of the well 18. The well bottom has an unobstructed opening 54 at the forward portion thereof, contiguously behind roller 30. A baffle 56 for suppressing turbulent fluid flow extends along at least the greater portion of the rest of the well bottom, with the remaining portions being closed solid or open to fluid flow, as desired. The lower surface of the battle preferably is planar, and it is at, or at least close to, the same horizontal level as the lowest point of the transport flight 12. This arrangement minimizes turbulence between the front end of battle and the location 42, and enhances entry of floatage into the well. Thus, the baffle 56 is characterized, at least in part, as being perforate and horizontally disposed at a selected level relative to the level of the transport at the lower location 42. Although not shown, the boat 10 can have whatever ballast and whatever propelling equipment is desired; these being provided according to conventional techniques.

The floatage recovering craft 10 operates by drawing floatage down the lower flight of the belt transport 14 and then releasing it in the collecting well 18. A pump 58 on the craft pumps the collected floatage from the well into further storage as desired. More specifically, forward motion of the craft pushes floatage which engages the transport lower flight 12 slightly under the water line 40. The floatage then exerts pressure against the transport. This pressure enables the transport to carry the floatage further under the water line 40 and along the transport as it is driven rearward to the lower roller 30. Thus, a combination of hydrodynamic and hydrostatic pressures are understood to hold floatage against the transport lower flight 12, so that the floatage moves with the transport as it travels from the forward upper roller 28 to the lower roller 30. The drive mechanism 44 generally drives the transport 14 at a speed that depends in part on the travel speed of the craft, i.e. it is considered preferable that the horizontal component of transport speed be as close as practical to the speed of the boat relative to the water. Under this condition, there is little'if any relative'mov'ement between the transport flight 12 and the floatagebearing water adjacent it. However, the invention can be practiced with a transport speed faster and, alternatively, slower than the craft travel. By way of illustrative example, a transport speed between 0.5 foot/- second and 5 feet-second can be used in recovering floatagesuch as oil and oil-sorbents with equipment as shown in FIGS. 1 and 2.

At any point along the transport flight 12, the inner sidewall of the hull floats and 22 extend deeper into the water than the flight, and aft of the location 42 they extend deeper than the flight at that location. The portions of the float sidewalls thus depending below the flight 12 block floatage being carried along theflight from flowing or otherwise moving laterally, i.e., sideways, out from under the transport and hence escaping from under the flight. Instead, the depending float sidewalls channel the floatage to remain under the transport lower flight. v

At the lowerlocation 42, where the lower flight of the materials transport ends and the transport begins to move upward, the trapped floatage is no longer depressed further into the water, but rather is released and allowed to rise due to its buoyancy. As FIG. 1 indicates, much of the floatage enters the well at the opening 54 in front of the baffle. Other increments of floatage are carried aft with the water current as they rise, and enter the well through the baffle. The baffle thus provides the well with a large open bottom area through which floatage can enter the well, thereby increasing the proportion of floatage trapped by the conveyor which collects in the well. The opening 54, whichcan be considered part of the baffle, is made large enought to allow large pieces of solid floatage, typically wood, to enter the well. The floatage that enters the collecting well 18 rises to the top of the water in the well. As indicated above, water displaced by floatage entering the well passes out of it through the baffle 56.

The baffle suppresses turbulent water flow which might draw floatage out of the well. The illustrated baffle is a honeycomb grid of upstanding or on-edge strips. Other constructions. and designs can be used for the baffle, the purpose of it being to allow floatage to enter the well and to allow water to flow into and out of the well 18, depending on the height of the column of collected floatage therein, and further to suppress water currents that would tend to draw collected floatage out of the well. By way of further example, the baffle can have strips such as those illustrated but extending only in the single direction transverse to the craft direction of travel, and other constructions will suggest themselves to those having conventional skill in the art. Further, the baffle openings can progressivelydecrease in size along the span of the baffle aftward from the location 42. A baffle as illustrated in'FIGS. 1 and 2 preferably is constructed with openings of between 1 and 8 inches along each side and with a baffle height between one andthree times this dimension.

As noted above, the floatage which the craft 10 of FIGS. 1 and 2 can collect includes'both solid and liquid materials, including oil, oil-sorbents, and a wide variety of other floating liquid and solid materials. The scraper 50 removes whatever floatage adheres or otherwise sticks to the belt transport 12 after it has passed upward from the lower roller 30 and before it passes around the drive roller 32. The material which the scraper thus removes from the transport remains collected in the well FIG. 3 is a view of a floatage recovery craft 60 similar to the view shown in FIG. 1 of the boat 10. In the craft 60, a belt transport 62 is trained on three rollers 64, 66 and 68 to provide a lower flight 70 similar to the flight 12 of FIG-l. However, the roller 68 is located well above the lower roller-66 and the water line. This arrangement forms the entire front wall of the collecting well 72 with the transport length between rollers 66 and 68. Further, the craft 60 has a mid-ship structure 74 which forms a storage tank 75 for collected floatage. A pump 76 transfers floatage from the collection well 72to the tank 75, by way of a pipe 78 which can pass by the belt transport 62 within one hull float 80, as indicated. t Y

FIG. 4 shows another floatage recovering-craft'82 in which a large drum 84, in conjunction with a forward roller 86, drives and positions a belt transport 88 to provide a moving and downwardly-inclined belt flight 90 which carries floatage to a collecting well 92. A stationary drum 94, typically containing fuel, ballast, or equipment for the craft 82, carries three rotatable wheel rollers 96, 98 and 100, that mount the. transportsupporting drum 84 for rotation relative to the inner drum 94. One wheel roller is driven to drive the drum 84 and hence the transport 88. Another like set of three wheel rollers'(not shown) is mounted on the stationary drum structure 94 and supports the drum 84 at a position axially-spaced from the set of wheel rollers 96, 98 and 100 shown. A storage tank 102 forward of the roller 84 and between the upper and lower flights of the belt transport 88 receives excess collected floatage from the well 92 by way of a pump 104.

The FIG. 4 craft 82 further has a platform 106 providirig a continuous backup surface 106a for the belt transport plate 90 between the rollers 86 and the drum 84. The surface 106a liessubstantially along the construction line tangent to both the drum 84 and roller 86 lower surfaces. The cylindrical surface of the drum 84 and the planarsurface 106a thus form a substantially continuous surface extending behind the full length of the belt transport engagement with floatage. Where this surface is impervious to the materials being recovered, the belt transport can have an open construction, rather than the continuous, substantially floatage impervious construction shown in FIG. 2.

FIGS. 5A and 5B illustrate open constructions for the belt transport 88. In FIG. 5A, the belt transport 88' is perforated with holes 107. The sidewalls of the holes increase the engagement of the transport with some types of floatage, and hence enhance the movement of such floatage down the flight 90 (FIG. 4) to the collecting well 92.

FIG. B illustrates another form of open construction belt transport for use in practicing the invention. This belt transport 88" is constructed with two endless chains 108 and 110 at the peripheral edges of the transport and interconnected with paddle members 112, in a manner similar to the construction of a belt conveyor. This paddle construction for the belt transport 88" can be cleaned free of adhering floatage by means of a brush 114, shown in FIG. 4. Either a stationary brush or a rotating one, with the direction of rotation preferably being opposite to that of the drum 84, can be used. Such a brush can, of course, also be used to clean other types of belt transports as shown in FIGS. 2 and 5A.

Further, the belt transport 88" is supported and driven on the roller 86 and drum .84 (FIG. 4) by means of sprocket wheels 116 shownin FIG. 5B mounted on the roller or drum, as the case may be. In fact, with this construction of the belt transport 88", the roller 86 can simplyhave the form of two rotatable sprocket wheels; no cylindrical surface is required. The term roller is used herein in a broad sense to include these and other rotatable belt-transport guides and driving wheel members.

Alternative to mounting the materials transport and collecting well on a boat or other craft as illustrated in the Figures, other structures can be used for deploying it. For example, a materials transport embodying the invention can be mounted by way of booms or other outrigging from a boat to provide the downwardly inclined lower flight described above in front of a floatage-collecting well.

Turning to FIGS. 6 and 7, they show a further floatage-collecting craft 110 according to the invention. As with the embodiments of FIGS. l-4, the craft 1l0 has a forwardly-facing declining belt transport 112 that feeds floatage front the water surface 114 downward below the surface and discharges it for entry intoa collection well 116. The lowest end of the transport 112 lower flight is spaced forward of, and at the same level as,.a baffle 1 l8 spanning across the bottom of the well to curtail currents from drawing floatage downward and out of the well;

The craft 110 has two features not shown in FIGS. l-4. One is the provision of a bottom plate 120 spaced below the baffle 118, and the other is the provision of an overall funnel shape to the collection'well 116.

The funnel-like geometry of the collection well channels the floatage in the well as a relatively small pocket 122 at the well top. A pumping system 124 draws the pumpable floatage out of the well at the pocket to storage tanks, typically located in the craft hull. This arrangement diminishes the likelihood that the pumping system will .pick up water from the well, even in relatively rough waters. Correspondingly it diminishes the volume of floatage that must be in the well to preclude picking up water when pumping out the floatage.

More particularly, as seen in FIGS. 6 and 7, the horizontal cross-sectional area of the funnelling collection well 1 16 is smallest at the well top and larges at the well bottom. The horizontal cross-sectional area of the well preferably diminishes progressively with height at least along the upper portion of the well to form the funnelling construction. However, it is not necessary that the well sidewalls taper inwardly in a symmetrical fashion, for the funnel shape does not need to be symmetrical in order torealize the foregoing advantages.

With further reference to FIGS. .6 and 7, the bottom plate 120 is provided for the purpose of preventing turbulent and other currents which the baffle 1 18 may not suppress from interfering with the collection of floatage. Specifically, such currents can reduce the proportion of floatage that enters the well, and they can carry floatage out of the well through the baffle. Also, the baffie 118 and the bottom plate 120, which in effect is a further baffle, diminish turbulence within the well with the result that a high degree of gravity separation between collected floatage and water takes place in the well. 1

The plate 120 can be either impervious to water, e.g., of sheet metal, or pervious so long as it blocks currents. The plate preferably spans the craft width between its twin hulls 1 26 and 128, and extends at least along the length of the well bottom. Further, it is considered preferable to extend the plate to the stern of the craft, as

- illustrated. It may be desirable to provide the plate 120 with a forwardextension 120a in the manner shown in phantom in FIG. 6.

The illustrated plate 120 is planar from the front of the well 116 to the craft stern, and extends parallel to i the water line 130 so as to beuniformly spaced below increasing height along the craft length and may enhance the entry of floatage into the well, rather than being carried all the way along the passage.

The-minimum spacing of the forward edge of the plate 120 below the transport and baffle is selected to allow at least substantially all floatage engaged below the transportto enter the passage 132. Generally the spacing is otherwise kept toa minimum andthe plate at least is above the lower edge of the hulls 126 and 128. By way of illustrative guideline, the spacing typically is between 4 inches and -12 inches in a craft of up to the order of 40 feet in length. To recover and transport floatage of different kinds and under different weather and water conditions, it, may be desirable to mount the plate 120 for selective movement, i.e., to

' raise or lower the plate, to draw it close to the baffle to effectively close the well bottom, and to change the angle of the plate relative to the craft 110.

The provision of the plate further isolates the collection well 116 from currents that tend to interfere with the collection and retention of floatage. Specifically, the plate blocks currents directed sideways relative to the forward movement of the craft, such as can arise during maneuvering. The plate also is efi'ective against currents that arise from forward motion of the craft 110, and from rolling and pitching of the craft in heavy seas. It is particularly desirable to isolate the well from heavy seas in this manner because, in contrast to prior floatage recovery equipment, the present invention can be used in heavy seas. This is because the invention recovers floatage by first submerging it, and

this substantially isolates the floatage being collected from surface waves.

It will thus be seen that the objects set forth above, among those made apparent from the preceding description, are efficiently attained. Since certain changes may be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having described the invention, what is claimed as new and secured byLetters Patent is:

1. Apparatus for skimming floating materials from the surface of a body of water and collecting the same comprising, in combination A. a first roller having a longitudinal axis of rotation,

B. means positioning said firstroller so that its axis of rotation is located above the surface of the body of water, C. a second roller, D. means positioning said second roller so that its longitudinal axis ofrotation is parallel 'to the first roller and horizontally spaced therefrom, at least a portion of said second roller surface being below the surface of the body of water and the lower horizontal tangent of said second roller being below the lower horizontal tangent of said first roller, E. endless material transport means carried by said rollers, I I 1 F. means for driving at least one of said rollers in a direction so that the lower flight of said material transport means moves downwardly from said first roller tosaid second roller, G. means forming a materials collecting and retaining well, said well 7 1. having a bottom opening and an enclosed periphery formed by sidewalls extending from above said surface to below it, said sidewalls which extend transversely to the horizontal spac-- ing betweensaid rollers extending downwardly substantially only to the level of said lower horizontal tangent of said second roller, I I

2. having said bottom opening disposed aft of said second roller and-extending along the-length of said well forthe passage therethrough of said material and of water, and

I-l. perforated baffle means horizontally disposed at least partially spanning said well bottom opening substantially at said level of said lower horizontal tangent of said second roller, for passing said material into said well and for blocking the flow of turbulent currents into said well through said bottom opening, whereby said transport means removes floating material from the surface of the water downwardly toward said second roller, and discharges said material below the water surface for the entry thereof into said well through said opening and at least in part through said baffle means.

2. In apparatus for removing at least liquid floatage from the surface of a body of liquid, and having 1. means forming an endless materials transport,

2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location, r

3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,

4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and

5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface,

the improvement wherein said well has an opening thereinto at the bottom thereof disposed no lower than the level of said transport at said second location and located beyond said second location from said first location, said opening extending along said direction of transport lower flight advance and communicating with said materials transport at said second location for the passage therethrough of liquid floatage buoyantly rising after discharge from below said lower flight. i

3. In apparatus as defined in claim 2,, the further improvement wherein said transport-mounting means includes means for disposingsaid transport with said lower flight thereof inclined from the horizontal by an angle substantially between 10 and 35.

4. In apparatus as defined in claim 2 the further improvement comprising pump means for removing from within said well said liquid floatage which is floating on said surface.

5. In apparatus as defined in claim 2 the further improvement wherein said peripheral walls of said collection well include first walls extending longitudinal to said transport and second walls extending transversely to said transport, and said transversely-extending walls extend vertically downward to a level nolower than the level of said transportlower flight at said second location. I

6. In apparatus as defined in claim 2 the further improvement wherein said well has a floatageconcentrating funnel-like configuration with the smallest horizontal cross-sectional area at the top thereof.

7. In apparatus as defined in claim 6, the further improvement comprising pump means communicating with said well at the funnel-like configuration thereof for pumping at least flowable floatage out from said wellj from the surface of a bodyof liquid, and having 1. means forming an endless materials transport,

2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location,

3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,

8. In apparatus for removing at least liquid floatage 4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and

5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface,

the improvement wherein Y A. said well has a bottom opening substantially at the level of said second location and located beyond said second location from said first location, said opening extending along said direction of conveyor lower flight advance and communicating with said materials transport at said second location for the passage therethrough of liquid floatage buoyantly rising after discharge from below said lower flight, and said well retains liquid floatage therein from said body of liquid, and

B. said transport, said mounting means, said drive means and said support means are together arranged for i. engaging said liquid floatage under said transport lower flight,

, ii. submerging at least a significant portion of said engaged liquid floatage and drawing it thereunder to said second location without significant adhesion to said transport, and

iii. discharging said portion of submerged liquid floatage from under said lower flight at said second location for buoyantly rising into said collection well through said bottom opening thereof.

9. In apparatus as defined in claim 8, the further improvement comprising horizontally-disposed and perforate baffle means spanning said bottom opening of said well at a level no lower than said transport at said second location, and arranged for the passage of said floatage therethrough and for impeding turbulent floatage-removing flow of the liquid of said body through said opening.

10. In apparatus as defined in claim 9, the further improvement wherein said perforate baffle means has a lower substantially horizontal face disposed at a first level which is no lower than the level of said transport lower flight 'at said second location.

11. In apparatus for removing floating material, in eluding at least liquid floatage, from the surface of a body of liquid, and having l. means forming an endless materials transport,

2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location, 7

3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,

4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and

5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface, the improvement wherein A. said well has a bottom opening located beyond said second location from said first location and extending along the length of said well in the direction of conveyor lower flight advance, said opening communicating with said materials transport for the passage therethrough of floatage buoyantly rising after discharge from below said lower flight,

B. said opening into said well includes a floatagepassing perforate baffle impeding turbulent flow of liquid through said opening, and

C. said well is arranged to retain said discharged liquid floatage therein from loss to said body of liquid.

12. In apparatus as defined in claim 11 the further improvement wherein said baffle has a lower substantially horizontal face disposed at the level of said lower flight at said second location.

13. In apparatus as defined in claim 11 the further improvement comprising a horizontally-arranged member spaced below said battle and below the level of said transport at said second location, for shielding said well opening from currents in said body of liquid.

14. in apparatus for removing floatage from the sur- 1 face of a body of liquid, and having 1. means forming an endless materials transport,

2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location,

3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,

4. support means for deploying said transport with said lower flightabove the surface of said liquid body at said first location and submerged below said surface at said second location, and

5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface,

the improvement wherein A. said peripheral walls of said well which exten transversely to said horizontal spacing between said locations extend downwardly substantially only to the level of said second location,

B..said well has a bottom opening thereinto located beyond said second location from said first location, said opening extending along the length of said well in said direction of transport lower flight advance and communicating with said materials transport for the passage therethrough of liquid floatage buoyantly rising after discharge from below said lower flight at said second location, and

C. a plate-like member is horizontally disposed below the level of said transport at said second location and is spaced beneath said well opening, and spans across at least said well opening for admitting floatage to pass thereabove and for shielding said well opening from currents in said body of liquid.

15. In apparatus for removing floating material including liquid floatage from a body of liquid and having a downwardly-inclined materials transport with a horizontally-extending lower flight passing between a first location above the surface of said liquid to a second location below said surface and horizontally spaced from said first location, the improvement comprising A. floatage-collecting well i. having an open bottom formed by peripheral walls including first wall means extending longitudinal to said transport and second wall means extending transversely to said transport, said transversely-extending wall means extending vertically from above said surface downwardly to no lower than said lower flight at said second location, and said longitudinally-extending wall means extending vertically from above said surface downwardly to at least the level of said lower flight at said second location, said bottom opening being located contiguously beyond said second location on the side thereof away from said first location and extending along the length of said well longitudinal to said transport, so that floatage, including said liquid floatage, moves along said transport lower flight to said second location and passes from said second location in the direction toward said opening for buoyantly rising into said well through said opening, and B. first perforate baffle means horizontally disposed at said well opening, whereby said baffle impedes the passage through said opening of turbulentlyflowing liquid of said body and allows floatage to pass therethrough from said second location and allows liquid of said body displaced from said well by floatage therein to pass outward from said well.

16. In apparatus as defined in claim 15, the further improvement wherein said first baffle means has a lower face at the level of said transport lower flight at said second location.

17. In apparatus as defined in claim 15, the further improvement comprising a horizontally arranged member for blocking from said well opening turbulent currents which are directed transversely to the spacing between said locations and to the spacing between said longitudinally-extending wall means, said member spanning said well opening and located below said first baffle means and below the level of said transport lower flight at said second location by a distance sufficient to allow floatage to pass from below said second location to above said member.

18. A method for collecting liquid floatage from a body of liquid, said method comprising the steps of A. submerging said floatage under a downwardlyinclined conveyor surface having a forward end above the surface of said body of liquid and having a back end below said liquid surface and which adrise thereof, within a vertically-extending, liquidretaining enclosure having a floatage-passing bottom opening extending from adjacent said back end of said conveyorsurface along said enclosure in the direction of said conveyor surface advance.

19. The method defined in claim 18 comprising the further step of impeding the flow of currents of said liquid body into said enclosure through said opening and concurrently allowing said floatage and liquid to pass therethrough.

20. The method defined in claim 18 comprising the further steps of A. baffling said enclosure bottom opening to impede the flow of currents of said liquid body therethrough, and

B. isolating said enclosure bottom from currents of said liquid body that are directed horizontally transversely to the spacing between said ends of said conveyor surface.

21. A method for collecting both solid and liquid floatage from a body of liquid, said method comprising the steps of A. engaging the floatage under a horizontallyextending and downwardly-inclined conveyor surface having a forward end above the surface of said body of liquid and having a back end below said liquid surface,

B. advancing said conveyor surface in the direction from said forward end to said back end, and at a rate to diminish relative movement between said liquid and said conveyor surface,

C. locating a collection well at said back end of said conveyor surface,

D. providing said well with at least a partially open bottom located at a depth below said surface of said liquid and not below said conveyor surface at said back end thereof,

E. extending said bottom opening from adjacent said back end of said conveyor surface backwardly along said well in the direction of advance of said conveyor surface,

F. discharging collected floatage, including liquid floatage, from under said conveyor surface at said back end for buoyantly rising into said collection well through said open bottom thereof, and

G. retaining said discharged floatage in said well from loss to said body of liquid.

22. The method defined in claim 21 comprising the further step of baffling currents of said liquid body from communicating through said open bottom of said collection well with liquid within said collection well by spanning across at least part of said well opening with a horizontally-extending liquid-baffling member.

UNi'EEfiU S'lA'llfiS lA'll'lN'l ()llfllllfi CElllllPlll/l'llfl Ul Cllllllllll'llQN Patent 3 8M251 Dated April 16 a 197 Inv nt flsUaa-fies- H. Farrell; Ralph A. Blanchi; Edward Eo Johanson It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1,, line 67' change "simply" to ==--simple- Column 5, line 52, change enought to enough- Column 6 9 line 8 9 "1" should be --2--.,

Column 7, line 53, after "well" change "as" to to-n Column l4, lines 9 and 10,, "liqubdretaining" should be "liquid-retaining",

Signed and sealed this 29th day of October 1974.

(SEAL) Attest: MCCOY M. GIBSON JR. C MARSHALL DANN Attestlng Officer v Commissioner of ;Tt$

USCOMM-DC 60376-F69 0 us. covzmmznr PRINIING OFFICE I969 0-4661.

FORM eo-loso (10459) 

2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location,
 2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location,
 2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location,
 2. transport-mounting means disposing said transport to have an upper flight thereof above a lower flight thereof and with said flights extending between first and second horizontally-spaced locations, said lower flight being inclined downwardly along the passage thereof from said first location to said second location,
 2. In apparatus for removing at least liquid floatage from the surface of a body of liquid, and having
 2. having said bottom opening disposed aft of said second roller and extending along the length of said well for the passage therethrough of said material and of water, and H. perforated baffle means horizontally disposed at least partially spanning said well bottom opening substantially at said level of said lower horizontal tangent of said second roller, for passing said material into said well and for blocking the flow of turbulent currents into said well through said bottom opening, whereby said transport means removes floating material from the surface of the water downwardly toward said second roller, and discharges said maTerial below the water surface for the entry thereof into said well through said opening and at least in part through said baffle means.
 3. In apparatus as defined in claim 2, the further improvement wherein said transport-mounting means includes means for disposing said transport with said lower flight thereof inclined from the horizontal by an angle substantially between 10* and 35*.
 3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,
 3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,
 3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,
 3. drive means for advancing said transport to move said lower flight in the direction from said first location to said second location,
 4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and
 4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and
 4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and
 4. In apparatus as defined in claim 2 the further improvement comprising pump means for removing from within said well said liquid floatage which is floating on said surface.
 4. support means for deploying said transport with said lower flight above the surface of said liquid body at said first location and submerged below said surface at said second location, and
 5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface, the improvement wherein said well has an opening thereinto at the bottom thereof disposed no lower than the level of said transport at said second location and located beyond said second location from said first location, said opening extending along said direction of transport lower flight advance and communicating with said materials transport at said second location for the passage therethrough of liquid floatage buoyantly rising after discharge from below said lower flight.
 5. In apparatus as defined in claim 2 the further improvement wherein said peripheral walls of said collection well include first walls extending longitudinal to said transport and second walls extending transversely to said transport, and said transversely-extending walls extend vertically downward to a level no lower than the level of said transport lower flight at said second location.
 5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface, the improvement wherein A. said peripheral walls of said well which extend transversely to said horizontal spacing between said locations extend downwardly substantially only to the level of said second location, B. said well has a bottom opening thereinto located beyond said second location from said first location, said opening extending along the length of said well in said direction of transport lower flight advance and communicating with said materials transport for the passage therethrough of liquid floatage buoyantly rising after discharge from below said lower flight at said second location, and C. a plate-like member is horizontally disposed below the level of said transport at said second location and is spaced beneath said well opening, and spans across at least said well opening for admitting floatage to pass thereabove and for shielding said well opening from currents in said body of liquid.
 5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having means forming peripheral walls extending vertically from above said surface downwardly to at least below said surface, the improvement wherein A. said well has a bottom opening located beyond said second location from said first location and extending along the length of said well in the direction of conveyor lower flight advance, said opening communicating with said materials transport for the passage therethrough of floatage buoyantly rising after discharge from below said lower flight, B. said opening into said well includes a floatage-passing perforate baffle impeding turbulent flow of liquid through said opening, and C. said well is arranged to retain said discharged liquid floatage therein from loss to said body of liquid.
 5. a floatage-collecting well mounted with said support means adjacent the side of said second location away from said first location, said well having meanS forming peripheral walls extending vertically from above said surface downwardly to at least below said surface, the improvement wherein A. said well has a bottom opening substantially at the level of said second location and located beyond said second location from said first location, said opening extending along said direction of conveyor lower flight advance and communicating with said materials transport at said second location for the passage therethrough of liquid floatage buoyantly rising after discharge from below said lower flight, and said well retains liquid floatage therein from said body of liquid, and B. said transport, said mounting means, said drive means and said support means are together arranged for i. engaging said liquid floatage under said transport lower flight, ii. submerging at least a significant portion of said engaged liquid floatage and drawing it thereunder to said second location without significant adhesion to said transport, and iii. discharging said portion of submerged liquid floatage from under said lower flight at said second location for buoyantly rising into said collection well through said bottom opening thereof.
 6. In apparatus as defined in claim 2 the further improvement wherein said well has a floatage-concentrating funnel-like configuration with the smallest horizontal cross-sectional area at the top thereof.
 7. In apparatus as defined in claim 6, the further improvement comprising pump means communicating with said well at the funnel-like configuration thereof for pumping at least flowable floatage out from said well.
 8. In apparatus for removing at least liquid floatage from the surface of a body of liquid, and having
 9. In apparatus as defined in claim 8, the further improvement comprising horizontally-disposed and perforate baffle means spanning said bottom opening of said well at a level no lower than said transport at said second location, and arranged for the passage of said floatage therethrough and for impeding turbulent floatage-removing flow of the liquid of said body through said opening.
 10. In apparatus as defined in claim 9, the further improvement wherein said perforate baffle means has a lower substantially horizontal face disposed at a first level which is no lower than the level of said transport lower flight at said second location.
 11. In apparatus for removing floating material, including at least liquid floatage, from the surface of a body of liquid, and having
 12. In apparatus as defined in claim 11 the further improvement wherein said baffle has a lower substantially horizontal face disposed at the level of said lower flight at said second location.
 13. In apparatus as defined in claim 11 the further improvement comprising a horizontally-arranged member spaced below said baffle and below the level of said transport at said seCond location, for shielding said well opening from currents in said body of liquid.
 14. In apparatus for removing floatage from the surface of a body of liquid, and having
 15. In apparatus for removing floating material including liquid floatage from a body of liquid and having a downwardly-inclined materials transport with a horizontally-extending lower flight passing between a first location above the surface of said liquid to a second location below said surface and horizontally spaced from said first location, the improvement comprising A. floatage-collecting well i. having an open bottom formed by peripheral walls including first wall means extending longitudinal to said transport and second wall means extending transversely to said transport, said transversely-extending wall means extending vertically from above said surface downwardly to no lower than said lower flight at said second location, and said longitudinally-extending wall means extending vertically from above said surface downwardly to at least the level of said lower flight at said second location, ii. said bottom opening being located contiguously beyond said second location on the side thereof away from said first location and extending along the length of said well longitudinal to said transport, so that floatage, including said liquid floatage, moves along said transport lower flight to said second location and passes from said second location in the direction toward said opening for buoyantly rising into said well through said opening, and B. first perforate baffle means horizontally disposed at said well opening, whereby said baffle impedes the passage through said opening of turbulently-flowing liquid of said body and allows floatage to pass therethrough from said second location and allows liquid of said body displaced from said well by floatage therein to pass outward from said well.
 16. In apparatus as defined in claim 15, the further improvement wherein said first baffle means has a lower face at the level of said transport lower fLight at said second location.
 17. In apparatus as defined in claim 15, the further improvement comprising a horizontally arranged member for blocking from said well opening turbulent currents which are directed transversely to the spacing between said locations and to the spacing between said longitudinally-extending wall means, said member spanning said well opening and located below said first baffle means and below the level of said transport lower flight at said second location by a distance sufficient to allow floatage to pass from below said second location to above said member.
 18. A method for collecting liquid floatage from a body of liquid, said method comprising the steps of A. submerging said floatage under a downwardly-inclined conveyor surface having a forward end above the surface of said body of liquid and having a back end below said liquid surface and which advances from said forward end to said back end and advances relative to said liquid, thereby to draw floatage from the liquid surface downward under said conveyor surface toward said back end, B. releasing the submerged liquid floatage from under said conveyor surface at said back end into said liquid, and C. collecting said released floatage, upon the buoyant rise thereof, within a vertically-extending, liquidretaining enclosure having a floatage-passing bottom opening extending from adjacent said back end of said conveyor surface along said enclosure in the direction of said conveyor surface advance.
 19. The method defined in claim 18 comprising the further step of impeding the flow of currents of said liquid body into said enclosure through said opening and concurrently allowing said floatage and liquid to pass therethrough.
 20. The method defined in claim 18 comprising the further steps of A. baffling said enclosure bottom opening to impede the flow of currents of said liquid body therethrough, and B. isolating said enclosure bottom from currents of said liquid body that are directed horizontally transversely to the spacing between said ends of said conveyor surface.
 21. A method for collecting both solid and liquid floatage from a body of liquid, said method comprising the steps of A. engaging the floatage under a horizontally-extending and downwardly-inclined conveyor surface having a forward end above the surface of said body of liquid and having a back end below said liquid surface, B. advancing said conveyor surface in the direction from said forward end to said back end, and at a rate to diminish relative movement between said liquid and said conveyor surface, C. locating a collection well at said back end of said conveyor surface, D. providing said well with at least a partially open bottom located at a depth below said surface of said liquid and not below said conveyor surface at said back end thereof, E. extending said bottom opening from adjacent said back end of said conveyor surface backwardly along said well in the direction of advance of said conveyor surface, F. discharging collected floatage, including liquid floatage, from under said conveyor surface at said back end for buoyantly rising into said collection well through said open bottom thereof, and G. retaining said discharged floatage in said well from loss to said body of liquid.
 22. The method defined in claim 21 comprising the further step of baffling currents of said liquid body from communicating through said open bottom of said collection well with liquid within said collection well by spanning across at least part of said well opening with a horizontally-extending liquid-baffling member. 